Chbistiajt mansfeld



(No Model.)

0. MANSFELD.

FEED MOTION FOR SEWING MAOHINES FOR BOOTS AND SHOES. v No. 332,812.Patented Dec. 22, 1885.

NITED STATES I-ATENT OF ICE.

FEED-MOTION FOR SEWlNG-MACHINES FOR. BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 332,812, dated December22, 1885.

Application filed Dccemher26,.1884. Serial No. 151,277. (No model.) 7

To all whom it may concern:

Be it known that I, CHRISTIAN MANSFELD a citizen of Germany, residing atReudnitz, Leipsic, in the Empire of Germany, have invented a new andImproved Feed-Motion on Sewing-Machines for Boots and Shoes, of whichthe following is a specification.

In the accompanying drawings, Figure I represents a front view of asewing-machine for boots and shoes, showingv only the feeding mechanismwith. my improvement attached and operated by cams. Fig. II is a sideview of part of the same; and Fig. III is a top view of the same, partlyin section.

Similar letters represent similar parts in all the figures.

From the driving-shaft a, Figs. I and III, the shaft 0 receives itsmotion by means of bevel-wheels b b. Upon the end of this shaft 0 cams dd are attached.

f is the feed-rod, having at its lower end the feeding-foot 9, attachedand hinged at its upper end at qto the guiding-rod f. Tothe feed-rod fan arm, 19, is attached, capable of being regulated or moved higher orlower on said feed-rodf. The guiding-rod f is provided with a spiralspring, k, capable of being regulated by a suitable nut, Z, andoperating so as to force said guiding-rodf, and consequently thefeeding-rodf, downward, and consequently the feeding-foot 9 upon thematerial operated upon, which latter is placed upon the usual-shapedhorn, r. To the lower end of the feedingrod f a spiral spring, 71, isattached,opcrating in such a manner as to draw this end of thefeeding-rod f backward. During the rotation of the shaft 0 the cam (1will act against the face of the feeding-rodf, so as to move the same atthe required time forward, and the cam d will act against the arm 19, soas to lift the same, and consequently the feeding-rodf, upward at therequired time.

n is a small eccentric, operated by hand, to regulate the amount ofbackward motion produced by the spiral spring h, and consequentlyregulating the length of the stitch.

The position of the arm 1) is regulated upon the feedingrod f accordingto the thickness of the material operated upon.

To facilitate the introduction of the mate- 'rial upon the horn r andbelow the foot y, a lever, 0, is arranged, operated by hand whenrequired, and acting against a suitable projection or pin, 8, attachedto the feeding-rodf, whereby this feedingrod can easily be moved upwardwhen required.

N is the needle bar, arranged in the usual manner.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of driving-shaft a, bevelgear I) b, shaft 0, double camd d, feeding-rod f, with arm 10, guide-rod f, spring is, spring h, andeccentric n, arranged'to operate in the manner and for the purposesubstantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHRISTI AN MANSFELD.

Witnesses:

EDMUND BAOH, HEINRICH L. ZUSKE.

